Book 1 - Silent Oath He swore never to get personal. She swore never to need saving. But some oaths are meant to be broken. Lee Sangwon lives by rules. As an ex-military strategist and head of a private security firm, discipline and distance keep him sharp. No attachments. No distractions. Protect the client-then walk away. Yoo Hyejung has spent her whole life behind the gates of her family's estate. After a string of mysterious break-ins, she hires Sangwon to keep her safe. But the deeper he digs, the clearer it becomes: the threats aren't random. Someone wants to unravel her family's legacy-and her name is the key. What begins as protection turns into something far more dangerous. For every night Sangwon guards her, the walls he built around himself begin to crack. And Hyejung, who vowed to stand alone, finds herself leaning on a man who might just risk everything to shield her. But in a world of syndicates, betrayal, and blood oaths, loyalty has a price. Will Sangwon keep his silent vow of detachment... or break it for her?

𓆩♡𓆪 y/n grew up in privilege - the daughter of a powerful family, raised in glittering halls and prestigious schools. yet behind her perfect image, she always carried a quiet emptiness, the kind that even wealth couldn't fill. in high school, one moment changed everything: she stood up for a boy who was constantly mocked for being poor, a boy with quiet eyes and a resilience that went unnoticed by everyone else. sangwon. after that day, their paths drifted apart. she belonged to a world of privilege, he belonged to survival. years later, y/n is in university, shielded by her family's wealth, with a chauffeur assigned to drive her around. except - her chauffeur isn't a stranger. it's sangwon. he's changed, stronger, sharper, but his life hasn't been kind. after his father's illness forced him to abandon his own dreams, sangwon now shoulders the weight of his family's survival. she doesn't recognize him at first. but he remembers everything. and inside the car, between silences, unexpected conversations, and stolen glances - their worlds collide again. two people who were never meant to share a future find themselves drawn together. she sees the cracks behind his stoic mask, he sees the loneliness hidden behind her perfect life. and soon, the line between employer and chauffeur, rich girl and poor boy, starts to blur... will the weight of the past and the difference in their worlds pull them apart again? or will fate finally give them the timing they once lost?